将多个自定义元素设置为 MultiAutoCompleteTextView ：Android

Question

从我的previous 帖子继续，我能够为MultiAutoCompleteTextView 设置多个元素，但我无法像链接图片中那样使用自定义背景和关闭按钮来包装这些项目。

我能够对单个元素执行相同的操作，但对于多个元素，运气不佳。

这是我尝试过的。

//将文本设置为MultiAutoCompleteTextView

private void setTextSample(String contactName) {

    final SpannableStringBuilder sb = new SpannableStringBuilder();
    TextView tv = (TextView) LayoutInflater.from(this).inflate(R.layout.textview, null);
    tv.setText(contactName);
    BitmapDrawable bd = (BitmapDrawable) convertViewToDrawable(tv);
    bd.setBounds(0, 0, bd.getIntrinsicWidth(), bd.getIntrinsicHeight());

    sb.append(contactName + ",");
    sb.setSpan(new ImageSpan(bd), sb.length()-(contactName.length()+1), 
            sb.length()-1,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    mMultiAutoCompleteTextView.setText(sb);
}

// 用自定义元素换行

private static Object convertViewToDrawable(View view) {
  int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
  view.measure(spec, spec);
  view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
  Bitmap b = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(),
            Bitmap.Config.ARGB_8888);
  Canvas c = new Canvas(b);
  c.translate(-view.getScrollX(), -view.getScrollY());
  view.draw(c);
  view.setDrawingCacheEnabled(true);
  Bitmap cacheBmp = view.getDrawingCache();
  Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
  view.destroyDrawingCache();
  return new BitmapDrawable(viewBmp);
}

非常感谢任何帮助。

编辑：

如果我这样做

mMultiAutoCompleteTextView.setText(mMultiAutoCompleteTextView.getText().toString()+", "+sb);

我收到多个文本，但它们没有用自定义背景包裹。 没有找到我要去的地方。

编辑：

示例多个元素看起来像这样

Answer 1

试试这个：

class MyMultiAutoCompleteTextView extends MultiAutoCompleteTextView {

    public MyMultiAutoCompleteTextView(Context context) {
        super(context);
    }

    @Override
    protected void replaceText(CharSequence text) {
        Log.d(TAG, "replaceText " + text.getClass() + " " + text);
        super.replaceText(getSpanned(text.toString()));
    }
}

private Spanned getSpanned(String name) {
    TextView tv = (TextView) LayoutInflater.from(this).inflate(R.layout.test, null);
    tv.setText(name);
    SpannableStringBuilder sb = new SpannableStringBuilder(name);
    sb.setSpan(new ViewReplacementSpan(tv), 0, sb.length(),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    return sb;
}

class ViewReplacementSpan extends DynamicDrawableSpan {
    private View v;
    private Drawable drawable;

    public ViewReplacementSpan(View v) {
        super(ALIGN_BOTTOM);
        this.v = v;
        int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
        v.measure(spec, spec);
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
        drawable = new SpanDrawable();
        drawable.setBounds(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    }

    @Override
    public Drawable getDrawable() {
        return drawable;
    }

    class SpanDrawable extends Drawable {
        @Override
        public void draw(Canvas canvas) {
            canvas.clipRect(getBounds());
            v.draw(canvas);
        }

        @Override
        public void setAlpha(int alpha) {
        }

        @Override
        public void setColorFilter(ColorFilter cf) {
        }

        @Override
        public int getOpacity() {
            return PixelFormat.TRANSLUCENT;
        }
    }
}

在 onCreate() 中使用以下内容对其进行测试：

LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);

MultiAutoCompleteTextView mactv = new MyMultiAutoCompleteTextView(this);
ArrayAdapter<Spanned> a = new ArrayAdapter<Spanned>(this, android.R.layout.simple_dropdown_item_1line);
String[] names = { "Jane", "John", "Mary", "Mark" };
for (String name: names) {
    a.add(getSpanned(name));
}

Tokenizer tokenizer = new MultiAutoCompleteTextView.CommaTokenizer();
mactv.setTokenizer(tokenizer);
mactv.setAdapter(a);
mactv.setThreshold(1);
SpannableStringBuilder sb = new SpannableStringBuilder();
for (int i = 0; i < 2; i++) {
    sb.append(tokenizer.terminateToken(a.getItem(i)));
}
mactv.setText(sb);
ll.addView(mactv);

TextView tv = new TextView(this);
tv.setGravity(Gravity.CENTER);
tv.setText("try: Jane, John, Mary or Mark");
tv.setTextSize(32);
ll.addView(tv);
setContentView(ll);

Answer 2

我觉得你这里有问题：

mMultiAutoCompleteTextView.setText(mMultiAutoCompleteTextView.getText().toString()+", "+sb);

当您调用 mMultiAutoCompleteTextView.getText().toString() 时，您会将 spannableString 转换为普通字符串，该字符串不能保存背景或其他内容。

尝试将您当前的 SpannableStringBuilder 保存在某处并像这样工作：

mBuilder.append(sb);
  mMultiAutoCompleteTextView.setText(mBuilder);